21356335477303 has 2 divisors, whose sum is σ = 21356335477304. Its totient is φ = 21356335477302.

The previous prime is 21356335477249. The next prime is 21356335477349. The reversal of 21356335477303 is 30377453365312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21356335477303 - 2³⁷ = 21218896523831 is a prime.

It is a super-2 number, since 2×21356335477303² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21356338477303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10678167738651 + 10678167738652.

It is an arithmetic number, because the mean of its divisors is an integer number (10678167738652).

Almost surely, 2^{21356335477303} is an apocalyptic number.

21356335477303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21356335477303 is an equidigital number, since it uses as much as digits as its factorization.

21356335477303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 52.

The spelling of 21356335477303 in words is "twenty-one trillion, three hundred fifty-six billion, three hundred thirty-five million, four hundred seventy-seven thousand, three hundred three".